using Microsoft.Extensions.Logging;
using JGSY.CMS.LowCode.Platform.Application.Interfaces;
using JGSY.CMS.LowCode.Platform.Infrastructure.CmsDbContext;

namespace JGSY.CMS.LowCode.Platform.Application.Services
{
    /// <summary>
    /// 租户资源配额管理服务实现
    /// Phase 4: 基础实现 - 提供接口契约满足，后续迭代完善业务逻辑
    /// </summary>
    public class TenantResourceQuotaService : ITenantResourceQuotaService
    {
        private readonly LowCodeDbContext _context;
        private readonly ILogger<TenantResourceQuotaService> _logger;

        public TenantResourceQuotaService(
            LowCodeDbContext context,
            ILogger<TenantResourceQuotaService> logger)
        {
            _context = context;
            _logger = logger;
        }

        // 配额管理基本操作
        public async Task<object> GetQuotaAsync(Guid tenantId)
        {
            _logger.LogInformation("Getting quota for tenant {TenantId}", tenantId);
            return await Task.FromResult(new { 
                tenantId = tenantId.ToString(),
                storage = new { limit = 1073741824, used = 0, unit = "bytes" }, // 1GB default
                users = new { limit = 10, used = 0 },
                apiCalls = new { limit = 10000, used = 0 },
                bandwidth = new { limit = 10737418240, used = 0, unit = "bytes" } // 10GB default
            });
        }

        public async Task<object> CreateQuotaAsync(Guid tenantId, object request)
        {
            _logger.LogInformation("Creating quota for tenant {TenantId}", tenantId);
            // TODO: Implement quota creation logic
            return await Task.FromResult(new { id = Guid.NewGuid(), tenantId = tenantId.ToString(), status = "created" });
        }

        public async Task<object> UpdateQuotaAsync(Guid tenantId, object request)
        {
            _logger.LogInformation("Updating quota for tenant {TenantId}", tenantId);
            // TODO: Implement quota update logic
            return await Task.FromResult(new { tenantId = tenantId.ToString(), status = "updated" });
        }

        public async Task DeleteQuotaAsync(Guid tenantId)
        {
            _logger.LogInformation("Deleting quota for tenant {TenantId}", tenantId);
            // TODO: Implement quota deletion logic
            await Task.CompletedTask;
        }

        // 资源使用情况
        public async Task<object> GetUsageAsync(Guid tenantId)
        {
            _logger.LogInformation("Getting usage for tenant {TenantId}", tenantId);
            return await Task.FromResult(new {
                tenantId = tenantId.ToString(),
                storage = new { used = 0, unit = "bytes" },
                users = new { active = 0, total = 0 },
                apiCalls = new { today = 0, thisMonth = 0 },
                bandwidth = new { used = 0, unit = "bytes" },
                lastUpdated = DateTime.UtcNow
            });
        }

        public async Task<List<object>> GetUsageHistoryAsync(Guid tenantId, DateTime? startTime = null, DateTime? endTime = null)
        {
            _logger.LogInformation("Getting usage history for tenant {TenantId}", tenantId);
            return await Task.FromResult(new List<object>());
        }

        // 配额检查
        public async Task<bool> CheckStorageQuotaAsync(Guid tenantId, long additionalSize = 0)
        {
            _logger.LogInformation("Checking storage quota for tenant {TenantId}", tenantId);
            // TODO: Implement actual storage quota check
            return await Task.FromResult(true);
        }

        public async Task<bool> CheckUserQuotaAsync(Guid tenantId, int additionalUsers = 0)
        {
            _logger.LogInformation("Checking user quota for tenant {TenantId}", tenantId);
            // TODO: Implement actual user quota check
            return await Task.FromResult(true);
        }

        public async Task<bool> CheckApiCallQuotaAsync(Guid tenantId, int additionalCalls = 0)
        {
            _logger.LogInformation("Checking API call quota for tenant {TenantId}", tenantId);
            // TODO: Implement actual API call quota check
            return await Task.FromResult(true);
        }

        public async Task<bool> CheckBandwidthQuotaAsync(Guid tenantId, long additionalBandwidth = 0)
        {
            _logger.LogInformation("Checking bandwidth quota for tenant {TenantId}", tenantId);
            // TODO: Implement actual bandwidth quota check
            return await Task.FromResult(true);
        }

        // 配额预警
        public async Task<List<object>> GetQuotaAlertsAsync(Guid tenantId)
        {
            _logger.LogInformation("Getting quota alerts for tenant {TenantId}", tenantId);
            return await Task.FromResult(new List<object>());
        }

        public async Task<object> CreateQuotaAlertAsync(Guid tenantId, object request)
        {
            _logger.LogInformation("Creating quota alert for tenant {TenantId}", tenantId);
            return await Task.FromResult(new { id = Guid.NewGuid(), tenantId = tenantId.ToString(), status = "created" });
        }

        public async Task<object> UpdateQuotaAlertAsync(Guid alertId, object request)
        {
            _logger.LogInformation("Updating quota alert {AlertId}", alertId);
            return await Task.FromResult(new { id = alertId, status = "updated" });
        }

        public async Task DeleteQuotaAlertAsync(Guid alertId)
        {
            _logger.LogInformation("Deleting quota alert {AlertId}", alertId);
            await Task.CompletedTask;
        }

        // 配额统计
        public async Task<object> GetQuotaStatisticsAsync(Guid tenantId)
        {
            _logger.LogInformation("Getting quota statistics for tenant {TenantId}", tenantId);
            return await Task.FromResult(new {
                tenantId = tenantId.ToString(),
                totalQuotas = 0,
                activeAlerts = 0,
                overageCount = 0,
                efficiencyScore = 100.0
            });
        }

        public async Task<List<object>> GetAllTenantsQuotaStatisticsAsync()
        {
            _logger.LogInformation("Getting quota statistics for all tenants");
            return await Task.FromResult(new List<object>());
        }

        // 配额重置
        public async Task ResetQuotaUsageAsync(Guid tenantId, string resourceType)
        {
            _logger.LogInformation("Resetting {ResourceType} quota usage for tenant {TenantId}", resourceType, tenantId);
            await Task.CompletedTask;
        }

        public async Task ResetAllQuotaUsageAsync(Guid tenantId)
        {
            _logger.LogInformation("Resetting all quota usage for tenant {TenantId}", tenantId);
            await Task.CompletedTask;
        }

        // 批量操作
        public async Task<List<object>> GetQuotasByTenantIdsAsync(List<Guid> tenantIds)
        {
            _logger.LogInformation("Getting quotas for {Count} tenants", tenantIds.Count);
            return await Task.FromResult(new List<object>());
        }

        public async Task UpdateMultipleQuotasAsync(List<object> requests)
        {
            _logger.LogInformation("Updating {Count} quotas", requests.Count);
            await Task.CompletedTask;
        }

        // 导出功能
        public async Task<byte[]> ExportQuotaReportAsync(Guid tenantId, string format = "xlsx")
        {
            _logger.LogInformation("Exporting quota report for tenant {TenantId} in {Format} format", tenantId, format);
            // TODO: Implement actual report export
            return await Task.FromResult(new byte[0]);
        }

        public async Task<byte[]> ExportAllTenantsQuotaReportAsync(string format = "xlsx")
        {
            _logger.LogInformation("Exporting quota report for all tenants in {Format} format", format);
            // TODO: Implement actual report export
            return await Task.FromResult(new byte[0]);
        }
    }
}
